Chrome remote desktop does not work with authenticated web proxy.
The Chrome Remote Desktop app is used to share desktops.
This fails to connect to the remote server if it is used in conjunction with a web proxy using any type of authentication. This is a known issue with Chrome Remote Desktop: https://support.google.com/chrome/answer/1649523?hl=en
If authentication exception fails to work, using a non-authenticating proxy would allow this to work. Detailed instructions on setting up a non-authenticating proxy can be found in our help topic, Creating authentication policies.